iPhone:

  1. Go to the iPhone Home screen 
  2. Go to 'Settings' > 'General' > 'Profiles'
  3. Tap 'Haystack'
  4. Tap 'Delete Profile'

This will be remove all Haystack cards from your phone contacts.

Android:

  1. Tap on the 'three lines' at the top > Settings
  2. Toggle 'Contact Syncing' to be off
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